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K&N 33-2945 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   31 Customer Reviews
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
The K&N 33-2945 Air Filter fits some Audi A4, Audi A4 allroad, Audi A4 Quattro, Audi A4 Quattro Cabriolet, Audi A5, Audi A5 Quattro, Audi allroad, and Audi Q5 models. See vehicle applications link for details.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Height1.563 in (40 mm)
Outside Length12.625 in (321 mm)
Outside Width5 in (127 mm)
Package Contents1 Air Filter
Package Quantity1
Product StylePanel Air Filter
Weight1.3 lb (0.6 kg)
Filter Re-Oiling Amount1.15 oz (34 ml)
Product Box Height13.56 in (345 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)

K&N 33-2945 Air Filter Product Reviews

Wednesday, March 7, 2018 - Part 33-2945
Fantastic bit of kit. Greatly improved the throttle response and driveability of my 2008 Audi A4 1.8 tfsi.

Monday, November 6, 2017 - Part 33-2945
I have now added K&N filters to my 2005 Audi TT and my 2014 Audi A5. In both cases, there is a difference in performance... The 2.0 TT has a very noticeable urge that feels to me like 10 hp+torque. The A5 is heavier and the improvement is there too. I just hear a little more induction roar as it accelerates, but it's worth it for the improvement.

Paul Gilbert
Mt Pleasant, South Carolina
Wednesday, November 1, 2017 - Part 33-2945
Easy to put in and noticed more power off the line. Now for more extras! :)

Michael McNally
Centereach, New York
Friday, September 15, 2017 - Part 33-2945
Excellent product, definitely made a difference to my car.

Raymond Watson
Paisley, United Kingdom
Friday, September 15, 2017 - Part 33-2945
Dead easy to fit myself, obviously a much higher quality and better designed part than the stock air filter and I can feel a quicker and better response when accelerating. A real no brainer.

Bournemouth, United Kingdom
Tuesday, August 8, 2017 - Part 33-2945
With the K&N air filter, I noticed a huge improvement in throtle and turbo response. I am very pleased with this purchase.

Murray Levin
Apex, North Carolina
Monday, August 7, 2017 - Part 33-2945
I'm always satisfy with the K&N replacement filter, it gives your car just that bit extra....

John Nout
Halsteren, Netherlands